NAME

       EZCNTR - draws a two dimensional contour map from data stored in a rectangular array.  A
       number of contouring defaults are used.

STATUS

       EZCNTR is obsolete.  It has been superseded by the contouring package, Conpack.  See the
       Conpack entry CPCNRC for a simple EZCNTR replacement.  For more complex examples refer to
       the conpack and conpack_params man pages as well as the NCAR Graphics Contouring and
       Mapping Tutorial.

       EZCNTR continues to be provided for compatibility of early NCAR Graphics codes.  If you
       are writing new code, we suggest that you use the more general and rigorous Conpack
       contouring package.  All EZCNTR options set by default can be duplicated by the proper
       selection of Conpack parameters.

SYNOPSIS

       CALL EZCNTR(Z,M,N) - draws a contour map based upon a set of default options.

DESCRIPTION

       Z           (an input array of type REAL) defining a two-dimensional field of extent M by
                   N, which is to be contoured.

       M           (an input parameter of type INTEGER)  which is the first dimension of the Z
                   array.

       N           (an input parameter of type INTEGER)  which is the second dimension of the Z
                   array.

EXAMPLES

       Use the ncargex command to see the relevant examples tconre, tcnqck, tcnsmt, and tcnsup.

ACCESS

       EZCNTR can be invoked in four different ways to create contour plots which vary
       considerably in appearance.  The four variations include quick, normal, smooth, and super
       contour lines.  This progression represents a tradeoff between speed of computation and
       the appearance of the contour plots.  These variations are specified through selected
       command line options of the ncargf77 command.

       To use EZCNTR, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably
       in that order.  Other optional libraries to create the quick, smooth, and super contours
       will automatically be linked by the ncargf77 command.  To run a code called mycode.f which
       has one or more calls to entry EZCNTR, issue one of the commands:

       NORMAL    Command:  "ncargf77 mycode.f"

                 The contours will be drawn as unsmoothed dashed or solid lines that can include
                 characters along the lines.

       QUICK     Command:  "ncargf77 -quick mycode.f"

                 The contours will be drawn as unsmoothed dashed or solid lines without
                 characters along the lines.  The QUICK drawing algorithm is faster and cruder
                 than that used for NORMAL contour lines.  QUICK uses a cell-by-cell analysis
                 rather than following each contour line to completion in sequence as is done in
                 the NORMAL algorithm.

       SMOOTH    Command:  "ncargf77 -smooth mycode.f"

                 The contours will be drawn as smoothed dashed or solid lines using splines under
                 tension.  There may be characters along the lines.

       SUPER     Command:  "ncargf77 -super mycode.f"

                 The contours will be drawn as smoothed dashed or solid lines using splines under
                 tension.  There may be characters along the lines.  Crowded lines can be
                 thinned.

MESSAGES

       When error conditions are detected, the support routine SETER is called in such a way that
       it writes a message to the standard error file (as defined by I1MACH(4)) and then
       terminates execution. The possible error messages are as follows:

       CONREC  - DIMENSION ERROR - M*N .GT. (2**IARTH)
       The array to be contoured is dimensioned M by N.  This is larger than the address space on
       this computer (2**IARTH) where IARTH is the size of an address integer.  Check your
       dimension sizes.

SEE ALSO

       Online: conrec, conrec_family_params, conrec_family, conpack, conpack_params, cpcnrc,
       ncargf77

       Hardcopy: NCAR Graphics Contouring and Mapping Tutorial; NCAR Graphics Fundamentals, UNIX
       Version; User's Guide for NCAR GKS-0A Graphics

COPYRIGHT

       Copyright (C) 1987-2009
       University Corporation for Atmospheric Research
       The use of this Software is governed by a License Agreement.